/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-regression/test23-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:18:00,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:18:00,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:18:00,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:18:00,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:18:00,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:18:00,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:18:00,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:18:00,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:18:00,561 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:18:00,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:18:00,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:18:00,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:18:00,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:18:00,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:18:00,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:18:00,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:18:00,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:18:00,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:18:00,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:18:00,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:18:00,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:18:00,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:18:00,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:18:00,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:18:00,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:18:00,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:18:00,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:18:00,672 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:18:00,729 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:18:00,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:18:00,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:18:00,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:18:00,732 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:18:00,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:18:00,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:18:00,734 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:18:00,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:18:00,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:18:00,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:18:00,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:18:00,735 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:18:00,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:18:00,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:18:00,736 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:18:00,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:18:00,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:18:00,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:18:00,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:18:00,737 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:18:00,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:18:00,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:18:00,738 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:18:00,738 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:18:00,739 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:18:01,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:18:01,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:18:01,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:18:01,181 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:18:01,182 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:18:01,183 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test23-1.c [2020-12-23 06:18:01,273 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3dd2cc03d/560ea10fbe154416b43a01f84406501c/FLAG2ffcc8e28 [2020-12-23 06:18:01,977 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:18:01,978 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/test23-1.c [2020-12-23 06:18:01,987 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3dd2cc03d/560ea10fbe154416b43a01f84406501c/FLAG2ffcc8e28 [2020-12-23 06:18:02,297 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3dd2cc03d/560ea10fbe154416b43a01f84406501c [2020-12-23 06:18:02,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:18:02,302 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:18:02,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:18:02,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:18:02,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:18:02,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:18:02" (1/1) ... [2020-12-23 06:18:02,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d83811 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02, skipping insertion in model container [2020-12-23 06:18:02,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:18:02" (1/1) ... [2020-12-23 06:18:02,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:18:02,334 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: StructLHS[VariableLHS[~d1~0,GLOBAL],a] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~d1~0,GLOBAL],b] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~d2~0,GLOBAL],a] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~d2~0,GLOBAL],b] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~pd2~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~pd2~0,],offset]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 06:18:02,517 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/test23-1.c[1075,1088] [2020-12-23 06:18:02,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:18:02,533 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#d1~0,GLOBAL],base],StructAccessExpression[IdentifierExpression[~#d1~0,GLOBAL],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#d1~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#d1~0,GLOBAL],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#d2~0,GLOBAL],base],StructAccessExpression[IdentifierExpression[~#d2~0,GLOBAL],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#d2~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#d2~0,GLOBAL],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~pd2~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~pd2~0,],offset]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 06:18:02,555 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/test23-1.c[1075,1088] [2020-12-23 06:18:02,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:18:02,573 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:18:02,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02 WrapperNode [2020-12-23 06:18:02,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:18:02,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:18:02,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:18:02,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:18:02,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (1/1) ... [2020-12-23 06:18:02,592 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (1/1) ... [2020-12-23 06:18:02,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:18:02,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:18:02,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:18:02,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:18:02,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (1/1) ... [2020-12-23 06:18:02,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (1/1) ... [2020-12-23 06:18:02,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (1/1) ... [2020-12-23 06:18:02,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (1/1) ... [2020-12-23 06:18:02,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (1/1) ... [2020-12-23 06:18:02,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (1/1) ... [2020-12-23 06:18:02,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (1/1) ... [2020-12-23 06:18:02,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:18:02,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:18:02,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:18:02,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:18:02,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:18:02,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:18:02,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:18:02,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 06:18:02,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:18:02,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:18:02,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 06:18:03,171 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:18:03,171 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-23 06:18:03,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:18:03 BoogieIcfgContainer [2020-12-23 06:18:03,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:18:03,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:18:03,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:18:03,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:18:03,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:18:02" (1/3) ... [2020-12-23 06:18:03,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@330681ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:18:03, skipping insertion in model container [2020-12-23 06:18:03,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:02" (2/3) ... [2020-12-23 06:18:03,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@330681ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:18:03, skipping insertion in model container [2020-12-23 06:18:03,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:18:03" (3/3) ... [2020-12-23 06:18:03,184 INFO L111 eAbstractionObserver]: Analyzing ICFG test23-1.c [2020-12-23 06:18:03,193 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:18:03,198 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:18:03,224 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:18:03,260 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:18:03,261 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:18:03,261 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:18:03,261 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:18:03,261 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:18:03,262 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:18:03,262 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:18:03,262 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:18:03,297 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-23 06:18:03,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 06:18:03,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:03,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:03,313 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:03,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:03,321 INFO L82 PathProgramCache]: Analyzing trace with hash 2100293056, now seen corresponding path program 1 times [2020-12-23 06:18:03,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:03,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743770334] [2020-12-23 06:18:03,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:03,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:03,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743770334] [2020-12-23 06:18:03,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:18:03,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:18:03,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592256771] [2020-12-23 06:18:03,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:18:03,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:03,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:18:03,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:18:03,670 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-23 06:18:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:03,702 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-12-23 06:18:03,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:18:03,704 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-12-23 06:18:03,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:03,713 INFO L225 Difference]: With dead ends: 30 [2020-12-23 06:18:03,713 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 06:18:03,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:18:03,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 06:18:03,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 06:18:03,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 06:18:03,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-23 06:18:03,758 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2020-12-23 06:18:03,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:03,759 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-23 06:18:03,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:18:03,759 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-23 06:18:03,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 06:18:03,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:03,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:03,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:18:03,762 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:03,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:03,768 INFO L82 PathProgramCache]: Analyzing trace with hash 478567452, now seen corresponding path program 1 times [2020-12-23 06:18:03,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:03,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455207939] [2020-12-23 06:18:03,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:04,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455207939] [2020-12-23 06:18:04,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:18:04,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-23 06:18:04,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070735323] [2020-12-23 06:18:04,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:18:04,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:04,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:18:04,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:18:04,088 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 11 states. [2020-12-23 06:18:04,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:04,449 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-12-23 06:18:04,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:18:04,450 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-12-23 06:18:04,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:04,451 INFO L225 Difference]: With dead ends: 59 [2020-12-23 06:18:04,451 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 06:18:04,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:18:04,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 06:18:04,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 25. [2020-12-23 06:18:04,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 06:18:04,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-23 06:18:04,462 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-12-23 06:18:04,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:04,463 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-23 06:18:04,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:18:04,463 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-23 06:18:04,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 06:18:04,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:04,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:04,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:18:04,464 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:04,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:04,465 INFO L82 PathProgramCache]: Analyzing trace with hash -108238562, now seen corresponding path program 1 times [2020-12-23 06:18:04,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:04,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305287808] [2020-12-23 06:18:04,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:04,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305287808] [2020-12-23 06:18:04,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:18:04,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 06:18:04,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950697620] [2020-12-23 06:18:04,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:18:04,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:04,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:18:04,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:18:04,574 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 9 states. [2020-12-23 06:18:04,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:04,797 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-12-23 06:18:04,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:18:04,797 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-23 06:18:04,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:04,800 INFO L225 Difference]: With dead ends: 54 [2020-12-23 06:18:04,800 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 06:18:04,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:18:04,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 06:18:04,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 25. [2020-12-23 06:18:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 06:18:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-23 06:18:04,827 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2020-12-23 06:18:04,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:04,828 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-23 06:18:04,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:18:04,828 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-23 06:18:04,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 06:18:04,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:04,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:04,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 06:18:04,829 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:04,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:04,831 INFO L82 PathProgramCache]: Analyzing trace with hash -501265572, now seen corresponding path program 1 times [2020-12-23 06:18:04,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:04,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115957574] [2020-12-23 06:18:04,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:05,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115957574] [2020-12-23 06:18:05,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:18:05,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-23 06:18:05,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605509635] [2020-12-23 06:18:05,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:18:05,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:05,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:18:05,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:18:05,025 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2020-12-23 06:18:05,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:05,335 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-12-23 06:18:05,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:18:05,336 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-12-23 06:18:05,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:05,337 INFO L225 Difference]: With dead ends: 51 [2020-12-23 06:18:05,337 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 06:18:05,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:18:05,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 06:18:05,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 22. [2020-12-23 06:18:05,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 06:18:05,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-23 06:18:05,344 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2020-12-23 06:18:05,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:05,344 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-23 06:18:05,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:18:05,344 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-23 06:18:05,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:18:05,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:05,345 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:05,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 06:18:05,346 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:05,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:05,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1851619425, now seen corresponding path program 1 times [2020-12-23 06:18:05,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:05,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771907979] [2020-12-23 06:18:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:05,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771907979] [2020-12-23 06:18:05,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288909985] [2020-12-23 06:18:05,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:18:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:05,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 06:18:05,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:18:05,756 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2020-12-23 06:18:05,757 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:18:05,767 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:18:05,769 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:18:05,769 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:50 [2020-12-23 06:18:05,904 INFO L348 Elim1Store]: treesize reduction 43, result has 39.4 percent of original size [2020-12-23 06:18:05,905 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 39 [2020-12-23 06:18:05,924 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:18:05,930 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 06:18:05,951 INFO L625 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2020-12-23 06:18:05,955 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:18:05,956 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:5 [2020-12-23 06:18:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:05,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:18:05,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2020-12-23 06:18:05,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747651195] [2020-12-23 06:18:05,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:18:05,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:05,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:18:05,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:18:05,982 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 16 states. [2020-12-23 06:18:06,473 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-12-23 06:18:06,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:06,981 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2020-12-23 06:18:06,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:18:06,986 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2020-12-23 06:18:06,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:06,987 INFO L225 Difference]: With dead ends: 55 [2020-12-23 06:18:06,988 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 06:18:06,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:18:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 06:18:07,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 27. [2020-12-23 06:18:07,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 06:18:07,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-12-23 06:18:07,005 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 18 [2020-12-23 06:18:07,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:07,005 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-12-23 06:18:07,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:18:07,006 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-12-23 06:18:07,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:18:07,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:07,007 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:07,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:18:07,222 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:07,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:07,224 INFO L82 PathProgramCache]: Analyzing trace with hash 829921185, now seen corresponding path program 1 times [2020-12-23 06:18:07,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:07,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056618067] [2020-12-23 06:18:07,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:07,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056618067] [2020-12-23 06:18:07,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924702519] [2020-12-23 06:18:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:18:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:07,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 06:18:07,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:18:07,589 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2020-12-23 06:18:07,590 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:18:07,603 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:18:07,606 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:18:07,606 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:50 [2020-12-23 06:18:07,790 INFO L348 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2020-12-23 06:18:07,791 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 34 [2020-12-23 06:18:07,795 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:18:07,798 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 06:18:07,817 INFO L625 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2020-12-23 06:18:07,823 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:18:07,824 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:5 [2020-12-23 06:18:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:07,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:18:07,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2020-12-23 06:18:07,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355624280] [2020-12-23 06:18:07,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:18:07,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:07,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:18:07,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:18:07,849 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 16 states. [2020-12-23 06:18:08,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:08,506 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-12-23 06:18:08,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:18:08,507 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2020-12-23 06:18:08,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:08,507 INFO L225 Difference]: With dead ends: 57 [2020-12-23 06:18:08,508 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 06:18:08,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:18:08,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 06:18:08,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 24. [2020-12-23 06:18:08,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 06:18:08,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-23 06:18:08,516 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-12-23 06:18:08,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:08,516 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-23 06:18:08,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:18:08,516 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-23 06:18:08,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 06:18:08,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:08,517 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:08,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:18:08,733 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:08,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:08,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1495361690, now seen corresponding path program 2 times [2020-12-23 06:18:08,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:08,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893409996] [2020-12-23 06:18:08,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:08,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893409996] [2020-12-23 06:18:08,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003740177] [2020-12-23 06:18:08,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:18:09,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:18:09,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:18:09,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 06:18:09,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:18:09,108 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2020-12-23 06:18:09,109 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:18:09,120 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:18:09,121 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:18:09,121 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:55 [2020-12-23 06:18:09,289 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:18:09,290 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 86 [2020-12-23 06:18:09,295 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:18:09,296 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:18:09,299 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:18:09,300 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:18:09,302 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:18:09,304 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:18:09,307 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2020-12-23 06:18:09,344 INFO L625 ElimStorePlain]: treesize reduction 47, result has 33.8 percent of original size [2020-12-23 06:18:09,349 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:18:09,349 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:9 [2020-12-23 06:18:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:09,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:18:09,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2020-12-23 06:18:09,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603800683] [2020-12-23 06:18:09,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:18:09,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:09,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:18:09,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:18:09,378 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 18 states. [2020-12-23 06:18:10,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:10,650 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-12-23 06:18:10,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 06:18:10,653 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 20 [2020-12-23 06:18:10,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:10,654 INFO L225 Difference]: With dead ends: 63 [2020-12-23 06:18:10,654 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 06:18:10,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=359, Invalid=1201, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:18:10,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 06:18:10,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 26. [2020-12-23 06:18:10,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 06:18:10,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-12-23 06:18:10,670 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2020-12-23 06:18:10,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:10,670 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-12-23 06:18:10,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:18:10,670 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-12-23 06:18:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 06:18:10,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:10,675 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:10,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:18:10,877 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:10,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:10,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1013708501, now seen corresponding path program 3 times [2020-12-23 06:18:10,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:10,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899453529] [2020-12-23 06:18:10,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:10,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:11,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:11,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899453529] [2020-12-23 06:18:11,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822548295] [2020-12-23 06:18:11,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:18:11,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 06:18:11,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:18:11,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 06:18:11,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:18:11,282 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2020-12-23 06:18:11,283 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:18:11,291 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:18:11,292 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:18:11,293 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:50 [2020-12-23 06:18:11,496 INFO L348 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2020-12-23 06:18:11,496 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 34 [2020-12-23 06:18:11,501 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:18:11,508 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 06:18:11,528 INFO L625 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2020-12-23 06:18:11,532 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:18:11,538 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:5 [2020-12-23 06:18:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:11,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:18:11,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 18 [2020-12-23 06:18:11,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106859320] [2020-12-23 06:18:11,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 06:18:11,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:11,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 06:18:11,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:18:11,549 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 19 states. [2020-12-23 06:18:13,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:13,037 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2020-12-23 06:18:13,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 06:18:13,038 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-12-23 06:18:13,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:13,039 INFO L225 Difference]: With dead ends: 69 [2020-12-23 06:18:13,039 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 06:18:13,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=512, Invalid=1650, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:18:13,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 06:18:13,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 28. [2020-12-23 06:18:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 06:18:13,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-23 06:18:13,048 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-12-23 06:18:13,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:13,048 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-23 06:18:13,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 06:18:13,048 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-23 06:18:13,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 06:18:13,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:13,049 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:13,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:18:13,264 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:13,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:13,265 INFO L82 PathProgramCache]: Analyzing trace with hash -2001461840, now seen corresponding path program 4 times [2020-12-23 06:18:13,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:13,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541571748] [2020-12-23 06:18:13,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:13,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541571748] [2020-12-23 06:18:13,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254255292] [2020-12-23 06:18:13,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:18:13,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:18:13,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:18:13,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 06:18:13,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:18:13,625 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2020-12-23 06:18:13,627 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:18:13,634 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:18:13,635 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 06:18:13,636 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:92, output treesize:76 [2020-12-23 06:18:54,089 INFO L348 Elim1Store]: treesize reduction 33, result has 8.3 percent of original size [2020-12-23 06:18:54,089 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 18 [2020-12-23 06:18:54,091 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:18:54,097 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:18:54,099 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:18:54,099 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:5 [2020-12-23 06:18:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:54,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:18:54,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 22 [2020-12-23 06:18:54,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646636175] [2020-12-23 06:18:54,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:18:54,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:54,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:18:54,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=371, Unknown=14, NotChecked=0, Total=462 [2020-12-23 06:18:54,144 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 22 states. [2020-12-23 06:19:06,451 WARN L197 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-23 06:19:18,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:19:18,972 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2020-12-23 06:19:18,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 06:19:18,973 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2020-12-23 06:19:18,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:19:18,974 INFO L225 Difference]: With dead ends: 75 [2020-12-23 06:19:18,974 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 06:19:18,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 55.4s TimeCoverageRelationStatistics Valid=705, Invalid=2356, Unknown=19, NotChecked=0, Total=3080 [2020-12-23 06:19:18,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 06:19:18,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 30. [2020-12-23 06:19:18,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 06:19:18,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-23 06:19:18,985 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2020-12-23 06:19:18,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:19:18,985 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-23 06:19:18,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:19:18,985 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-23 06:19:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:19:18,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:19:18,986 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:19:19,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:19:19,202 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:19:19,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:19:19,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2044648203, now seen corresponding path program 5 times [2020-12-23 06:19:19,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:19:19,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551934096] [2020-12-23 06:19:19,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:19:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:19:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:19:19,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551934096] [2020-12-23 06:19:19,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579316406] [2020-12-23 06:19:19,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:19:19,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 06:19:19,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:19:19,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 06:19:19,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:19:19,647 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2020-12-23 06:19:19,648 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:19:19,658 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:19:19,660 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:19:19,660 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:50 [2020-12-23 06:19:20,006 INFO L348 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2020-12-23 06:19:20,007 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 34 [2020-12-23 06:19:20,010 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:19:20,012 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 06:19:20,038 INFO L625 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2020-12-23 06:19:20,041 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:19:20,041 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:5 [2020-12-23 06:19:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:19:20,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:19:20,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2020-12-23 06:19:20,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205960693] [2020-12-23 06:19:20,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:19:20,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:19:20,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:19:20,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:19:20,052 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 23 states. [2020-12-23 06:19:22,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:19:22,854 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2020-12-23 06:19:22,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 06:19:22,855 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-23 06:19:22,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:19:22,856 INFO L225 Difference]: With dead ends: 81 [2020-12-23 06:19:22,856 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 06:19:22,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=929, Invalid=2977, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:19:22,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 06:19:22,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 32. [2020-12-23 06:19:22,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 06:19:22,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-23 06:19:22,867 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-12-23 06:19:22,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:19:22,867 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-23 06:19:22,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:19:22,867 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-23 06:19:22,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 06:19:22,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:19:22,868 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:19:23,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:19:23,082 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:19:23,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:19:23,084 INFO L82 PathProgramCache]: Analyzing trace with hash -597070086, now seen corresponding path program 6 times [2020-12-23 06:19:23,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:19:23,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181640180] [2020-12-23 06:19:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:19:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:19:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:19:23,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181640180] [2020-12-23 06:19:23,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635035167] [2020-12-23 06:19:23,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:19:23,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 06:19:23,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:19:23,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 06:19:23,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:19:23,673 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2020-12-23 06:19:23,674 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:19:23,685 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:19:23,686 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:19:23,687 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2020-12-23 06:19:24,152 INFO L348 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2020-12-23 06:19:24,152 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 17 [2020-12-23 06:19:24,154 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:19:24,159 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:19:24,161 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:19:24,161 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:5 [2020-12-23 06:19:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:19:24,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:19:24,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 25 [2020-12-23 06:19:24,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527106147] [2020-12-23 06:19:24,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 06:19:24,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:19:24,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 06:19:24,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:19:24,207 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 26 states. [2020-12-23 06:19:27,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:19:27,790 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2020-12-23 06:19:27,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 06:19:27,791 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2020-12-23 06:19:27,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:19:27,792 INFO L225 Difference]: With dead ends: 85 [2020-12-23 06:19:27,792 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 06:19:27,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=831, Invalid=2475, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:19:27,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 06:19:27,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 37. [2020-12-23 06:19:27,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 06:19:27,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-12-23 06:19:27,804 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 28 [2020-12-23 06:19:27,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:19:27,804 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-12-23 06:19:27,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 06:19:27,805 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-12-23 06:19:27,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 06:19:27,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:19:27,806 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:19:28,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:19:28,019 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:19:28,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:19:28,020 INFO L82 PathProgramCache]: Analyzing trace with hash -237666758, now seen corresponding path program 2 times [2020-12-23 06:19:28,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:19:28,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590956583] [2020-12-23 06:19:28,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:19:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:19:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:19:28,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590956583] [2020-12-23 06:19:28,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560072436] [2020-12-23 06:19:28,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:19:28,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:19:28,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:19:28,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 06:19:28,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:19:28,552 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2020-12-23 06:19:28,553 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:19:28,563 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:19:28,564 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:19:28,564 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2020-12-23 06:19:29,007 INFO L348 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2020-12-23 06:19:29,008 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 17 [2020-12-23 06:19:29,010 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:19:29,016 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:19:29,017 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:19:29,018 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:5 [2020-12-23 06:19:29,057 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:19:29,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:19:29,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 25 [2020-12-23 06:19:29,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591383771] [2020-12-23 06:19:29,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 06:19:29,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:19:29,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 06:19:29,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:19:29,059 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 26 states. [2020-12-23 06:19:31,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:19:31,158 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2020-12-23 06:19:31,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:19:31,158 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2020-12-23 06:19:31,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:19:31,159 INFO L225 Difference]: With dead ends: 87 [2020-12-23 06:19:31,159 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 06:19:31,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=446, Invalid=1360, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:19:31,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 06:19:31,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 34. [2020-12-23 06:19:31,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 06:19:31,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-12-23 06:19:31,171 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 28 [2020-12-23 06:19:31,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:19:31,171 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-12-23 06:19:31,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 06:19:31,171 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-12-23 06:19:31,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:19:31,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:19:31,172 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:19:31,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 06:19:31,386 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:19:31,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:19:31,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1043903553, now seen corresponding path program 7 times [2020-12-23 06:19:31,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:19:31,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71752686] [2020-12-23 06:19:31,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:19:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:19:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:19:31,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71752686] [2020-12-23 06:19:31,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417596286] [2020-12-23 06:19:31,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:19:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:19:31,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 06:19:31,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:19:31,976 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2020-12-23 06:19:31,976 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:19:31,988 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:19:31,989 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:19:31,989 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:50 [2020-12-23 06:19:32,566 INFO L348 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2020-12-23 06:19:32,567 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 34 [2020-12-23 06:19:32,569 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:19:32,571 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 06:19:32,599 INFO L625 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2020-12-23 06:19:32,603 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:19:32,603 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:5 [2020-12-23 06:19:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:19:32,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:19:32,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 27 [2020-12-23 06:19:32,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769631375] [2020-12-23 06:19:32,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 06:19:32,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:19:32,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 06:19:32,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:19:32,652 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 28 states. [2020-12-23 06:19:36,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:19:36,798 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2020-12-23 06:19:36,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 06:19:36,799 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 30 [2020-12-23 06:19:36,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:19:36,800 INFO L225 Difference]: With dead ends: 91 [2020-12-23 06:19:36,800 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 06:19:36,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1018, Invalid=3014, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 06:19:36,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 06:19:36,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 39. [2020-12-23 06:19:36,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 06:19:36,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-12-23 06:19:36,813 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 30 [2020-12-23 06:19:36,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:19:36,813 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-12-23 06:19:36,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 06:19:36,814 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-12-23 06:19:36,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:19:36,814 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:19:36,815 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:19:37,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:19:37,021 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:19:37,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:19:37,022 INFO L82 PathProgramCache]: Analyzing trace with hash 745310975, now seen corresponding path program 3 times [2020-12-23 06:19:37,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:19:37,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723397563] [2020-12-23 06:19:37,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:19:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:19:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:19:37,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723397563] [2020-12-23 06:19:37,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959665066] [2020-12-23 06:19:37,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:19:37,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 06:19:37,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:19:37,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 06:19:37,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:19:37,589 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2020-12-23 06:19:37,590 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:19:37,600 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:19:37,601 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:19:37,601 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2020-12-23 06:19:38,142 INFO L348 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2020-12-23 06:19:38,143 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 17 [2020-12-23 06:19:38,146 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:19:38,155 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:19:38,156 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:19:38,157 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:5 [2020-12-23 06:19:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:19:38,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:19:38,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 27 [2020-12-23 06:19:38,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498617653] [2020-12-23 06:19:38,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 06:19:38,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:19:38,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 06:19:38,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:19:38,206 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 28 states. [2020-12-23 06:19:40,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:19:40,713 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-12-23 06:19:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:19:40,714 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 30 [2020-12-23 06:19:40,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:19:40,715 INFO L225 Difference]: With dead ends: 93 [2020-12-23 06:19:40,716 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 06:19:40,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=539, Invalid=1623, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:19:40,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 06:19:40,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 36. [2020-12-23 06:19:40,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 06:19:40,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-23 06:19:40,731 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-12-23 06:19:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:19:40,731 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-23 06:19:40,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 06:19:40,732 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-23 06:19:40,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 06:19:40,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:19:40,733 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:19:40,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:19:40,949 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:19:40,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:19:40,950 INFO L82 PathProgramCache]: Analyzing trace with hash -954135740, now seen corresponding path program 8 times [2020-12-23 06:19:40,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:19:40,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372441017] [2020-12-23 06:19:40,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:19:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:19:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:19:41,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372441017] [2020-12-23 06:19:41,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239761894] [2020-12-23 06:19:41,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:19:41,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:19:41,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:19:41,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 06:19:41,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:19:41,552 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2020-12-23 06:19:41,553 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:19:41,564 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:19:41,569 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:19:41,569 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:50 [2020-12-23 06:19:42,251 INFO L348 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2020-12-23 06:19:42,251 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 34 [2020-12-23 06:19:42,254 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:19:42,255 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 06:19:42,286 INFO L625 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2020-12-23 06:19:42,288 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:19:42,288 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:5 [2020-12-23 06:19:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:19:42,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:19:42,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 29 [2020-12-23 06:19:42,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994875542] [2020-12-23 06:19:42,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 06:19:42,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:19:42,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 06:19:42,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:19:42,341 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 30 states. [2020-12-23 06:19:47,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:19:47,227 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2020-12-23 06:19:47,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 06:19:47,228 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 32 [2020-12-23 06:19:47,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:19:47,229 INFO L225 Difference]: With dead ends: 97 [2020-12-23 06:19:47,229 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 06:19:47,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1224, Invalid=3606, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:19:47,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 06:19:47,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 41. [2020-12-23 06:19:47,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 06:19:47,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-12-23 06:19:47,247 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 32 [2020-12-23 06:19:47,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:19:47,247 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-12-23 06:19:47,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 06:19:47,247 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-12-23 06:19:47,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 06:19:47,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:19:47,248 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:19:47,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 06:19:47,451 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:19:47,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:19:47,452 INFO L82 PathProgramCache]: Analyzing trace with hash 494107268, now seen corresponding path program 4 times [2020-12-23 06:19:47,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:19:47,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815870893] [2020-12-23 06:19:47,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:19:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:19:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:19:47,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815870893] [2020-12-23 06:19:47,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136945194] [2020-12-23 06:19:47,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:19:47,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:19:47,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:19:47,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 06:19:47,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:19:48,006 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2020-12-23 06:19:48,010 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:19:48,019 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:19:48,021 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 06:19:48,021 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:59 [2020-12-23 06:21:36,040 INFO L348 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2020-12-23 06:21:36,041 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 19 [2020-12-23 06:21:36,043 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:21:36,051 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:21:36,053 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:21:36,053 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:66, output treesize:5 [2020-12-23 06:21:36,118 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:21:36,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:21:36,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 30 [2020-12-23 06:21:36,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339775436] [2020-12-23 06:21:36,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 06:21:36,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:21:36,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 06:21:36,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=673, Unknown=54, NotChecked=0, Total=870 [2020-12-23 06:21:36,120 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 30 states. [2020-12-23 06:21:43,250 WARN L197 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-23 06:21:45,576 WARN L197 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-23 06:21:53,078 WARN L197 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-23 06:21:55,561 WARN L197 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-23 06:21:55,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:21:55,813 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-12-23 06:21:55,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-23 06:21:55,816 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 32 [2020-12-23 06:21:55,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:21:55,816 INFO L225 Difference]: With dead ends: 99 [2020-12-23 06:21:55,817 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 06:21:55,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2007 ImplicationChecksByTransitivity, 122.7s TimeCoverageRelationStatistics Valid=1604, Invalid=5824, Unknown=54, NotChecked=0, Total=7482 [2020-12-23 06:21:55,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 06:21:55,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 38. [2020-12-23 06:21:55,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 06:21:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-12-23 06:21:55,838 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 32 [2020-12-23 06:21:55,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:21:55,838 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-12-23 06:21:55,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 06:21:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-12-23 06:21:55,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 06:21:55,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:21:55,839 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:21:56,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 06:21:56,054 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:21:56,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:21:56,055 INFO L82 PathProgramCache]: Analyzing trace with hash -586613367, now seen corresponding path program 9 times [2020-12-23 06:21:56,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:21:56,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007656750] [2020-12-23 06:21:56,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:21:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:21:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:21:56,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007656750] [2020-12-23 06:21:56,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934718888] [2020-12-23 06:21:56,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:21:56,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 06:21:56,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:21:56,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 06:21:56,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:21:57,174 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2020-12-23 06:21:57,175 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:21:57,201 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:21:57,205 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 06:21:57,206 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:79 [2020-12-23 06:21:59,159 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 06:21:59,164 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:21:59,164 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 18 [2020-12-23 06:21:59,166 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:21:59,187 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:21:59,191 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 06:21:59,191 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:86, output treesize:27 [2020-12-23 06:22:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:22:03,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:22:03,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2020-12-23 06:22:03,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478559852] [2020-12-23 06:22:03,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 06:22:03,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:22:03,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 06:22:03,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1164, Unknown=2, NotChecked=0, Total=1406 [2020-12-23 06:22:03,303 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 38 states. [2020-12-23 06:22:15,460 WARN L197 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-12-23 06:22:22,744 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62